<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>1-表单标签一</title>
</head>
<body>
    <p>
        男: <input type="radio" name="sex" value="0" checked> 女: <input type="radio" name="sex" value="1">
    </p>
</body>
</html>